Wrench.



M. SPIRIKOWICZ.

WRENCH.-

APPLICATION FILED DEC.27, |915.

1 1 79,34 1 Patented Apr. 11, .1916.-v

UNTTED STATES PATENT OFFICE.

MATEUSZ SPIRIKOWICZ, OF CHICAGO, LLINOIS, ASSIG-NOR OF ONE-HALF TOJOI-IN MASILUNAS, OF CHICAGO, ILLINOIS.

WRENCH.

Specication of Letters Patent.

Patented Apr. 11, 1916.

Application led December 27, 1915. Serial No. 68,611.

To all whom t may concern:

Be it known that I, MATEUsz Srnunowioz, a subject of the Czar of Russia,and resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Vrenches, of whichthe following is a specification.

This invention relates to improvements in wrenches and particularly tothat class ofwrenches which comprise two approximately fiat handlemembers secured togetherand holding in each end a ratchet wheel and apair of nut seats or heads, the said ratchet wheel being operativelyengaged by an integral two membered pawl pivoted to engage with theratchet in accordance with the direction the handle is to be turned, andspring means operated in connection with a fixed stop or lug attached tothe handle for positioning either member of the pawl in the ratchet asdesired, and it consists in certain peculiarities of the construction,novel arrangement and operation of the various parts thereof as will behereinafter more fully set forth and specifically claimed.

The principal. object of the invention is to provide a double ratchetwrench of the class before referred to, which shall be simple andinexpensive in construction, strong, durable and efficient in operation,and so made that it will be adapted for engagement with nuts ofdifferent sizes and shapes, without any alterations in the device.

Another obj ect of the invention is to provide a novel form of springmember and a duplex-pawl for engagement with the ratchet wheels of thenut seats or heads.

A still further object is to provide means whereby the nut seats orheads can be used interchangeably.

Other objects and advantages of the `invention will be disclosed in thesubjoined description and explanation.

In the accompanying drawing which serves to illustrate the invention-Figure l is a side view of a wrench showing it in its completed form.Fig. 2 is an enlarged view partly in section and partly in elevation ofa portion of the wrench showing one of the members of the pawl inengagement with the ratchet wheel of the nut seat or head. Fig. 3 is asectional view taken on line 3-3 of Fig. 2 looking in the direction indicated by the arrows. Fig. 4 is a detached Ashown in Fig. 1 of thedrawing. This handle consists of two pieces, 7 and 8,- which aresecuredtogether, one on the other, by means of screws 9 or otherwise.Each of the members 7 and 8 of the handle, has extending from each ofits ends and on the inner surface thereof a mortiselO, so that when saidmembers are joined together the mortises 10 will provide a recess forthe operation of a pawl 11 which is of the du-v pleX form, or in otherwords, has two members 12 and 13 at its freeend to alternately engagethe ratchet wheel near which the pawl is pivotally mounted on the handlei As the construction of each end of the wrench is substantially thesame, it is not deemed necessary to describe both of them. Near theirends the members Tand 8 of the handle are provided with a transverseopening 14 in which is located a cylindrical head 15 which is'providedon its periphery with ratchet teeth 16 adapted to operate in the outerportion of the recess formed by the mortises 10 in the members of thehandle. This head 15 is provided ywith ai central opening 17'therethrough for the purpose of allowing rods having nuts thereon to beeX- tended thereinto or therethrough, and said head has in one of itsends a nut seat 18 of any desired shape and size to engage nuts. 0n theopposite end of the head 15 from that in which the nut seat 18 isformed, is secured by means of a set screw 19 a collar 20 which also hasa nut seat 21 of any suitable size and shape.

Each of the recesses 10 of the members of the handle is tapered at itsinner' end as at 22, see Fig. 2 of the drawing, so that when the pawl isin the position shown said figure, it will be pressed bv the wall of therecess resting against the side portion of the pawl near its pivotedend, aswill be readily understood by reference to the last named ligureof the drawing. The pawl is secured to the handle by means of a pivot 23which is passed through suitable openings in the handle and pawl.Extended transversely from one of the members 12 to the other member 13of the pawl is a bar 24 Which has on one of its surfaces a cam shapeddepression 25 in which is located a spring finger 26 which is secured atone of its ends to the paWl at the juncture of the members 12 and 13thereof. This finger 26 is deflected toward the bar 24 and also toward astud or projection 27 on one of the members of the handle, Within themortise thereof and near the opening 14. therethrough. By thisarrangement it is evident that When the pawl is shifted from oneposition to another, so as to cause its members 12 and 13 to alternatelyengage the ratchet, the linger 26 will be slightly raised by one of thesloping sides of the depression 25 in the bar 24, so that said fingerwill ride over the rounded portion of the stud 27 until it reaches theother side of said stud, When by reason of its resiliency it will againengage the stud and thus hold the other member of the paWl in engagementwith the ratchet. By detachably securing the collar 20 on one end of thehead 15 it is apparent that collars having nut seats of different sizescan be readily and interchangeably used on the cylindrical head -so asto accommodate almost any size nut. The shifting of the pawl 11 can bequickly and efliciently done by placing the thumb of the operator on oneof the members of the pawl and pressing it in the proper direction.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is- 1. In a ratchet-Wrench, the combinationwith a handle, of a head rotatably mounted thereon and having peripheralteeth and provided with a nut receiving seat at each of its ends, adupleX-paWl pivotally mounted on the handle and striding the'toothedportion of said head, a transverse bar connecting the members of thepaWl transversely near their 'free ends and having a curved depressionin one of its surfaces, a resilient finger secured at one of its ends tothe parvl and extended normally in said depression, and a stud on thehandle to engage said iinger near its free end.

2. In a ratchet-Wrench, the combination with a handle, of a headrotatably mounted thereon and having peripheral teeth and provided witha nut receiving seat at one of its ends, a collar detachably mounted onthe other end of said head and having a nut receiving seat, aduplex-pand pivotally mounted on the Vhandle and striding the toothedportion of said head, a transverse bar connecting the members of thepaivl near their free ends and having a depression curved at each of itsends in one of its surfaces, a resilient finger' fixed at one of itsends to the paivl at the juncture of the members thereof and extendednormally in said depression, and a stud mounted on the handle to engagesaid finger near its free end and having its free portion rounded.

3. As an improved article of manufacture, a pawl for ratchet Wrenchesconsisting of a single piece having divergently extended members unitedtransversely by a bar having in one of its surfaces a curved depressionor recess, and a resilient linger fixed at one of its ends to the pawland extended into said recess.

MATEUSZ SPIRKOWICZ.

Witnesses Unas. C. TILLMAN, A. E. OLSON.

Copies of this patent may be obtained for ve cents each, by addressingche Commissioner of Patente Washington, D. C.

